Written by the Fiveable Content Team • Last updated September 2025
Verified for the 2026 exam
Verified for the 2026 exam•Written by the Fiveable Content Team • Last updated September 2025
Definition
Strenuous exercise refers to intense physical activity that requires significant effort and energy expenditure. It often involves pushing the limits of one's endurance and can lead to fatigue or exhaustion.
These are natural chemicals produced by the brain that act as painkillers and mood enhancers. They help block pain signals during strenuous exercise, providing a sense of euphoria or "runner's high."
Pain threshold: This refers to the level at which an individual starts to feel discomfort or pain. During strenuous exercise, endorphins can raise our pain threshold, allowing us to push through discomfort more easily.
Another neurotransmitter released during strenuous exercise, dopamine is associated with feelings of reward and pleasure. It contributes to the positive psychological effects experienced after completing intense physical activity.